40142101 has 4 divisors (see below), whose sum is σ = 40256172. Its totient is φ = 40028032.

The previous prime is 40142071. The next prime is 40142129. The reversal of 40142101 is 10124104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25010001 + 15132100 = 5001^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 40142101 - 2⁷ = 40141973 is a prime.

It is a super-2 number, since 2×40142101² = 3222776545388402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40142161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56506 + ... + 57211.

It is an arithmetic number, because the mean of its divisors is an integer number (10064043).

Almost surely, 2^40142101 is an apocalyptic number.

It is an amenable number.

40142101 is a deficient number, since it is larger than the sum of its proper divisors (114071).

40142101 is a wasteful number, since it uses less digits than its factorization.

40142101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114070.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 40142101 is about 6335.7794311355. The cubic root of 40142101 is about 342.3996928632.

Adding to 40142101 its reverse (10124104), we get a palindrome (50266205).

The spelling of 40142101 in words is "forty million, one hundred forty-two thousand, one hundred one".